含缺陷滚动轴承内部载荷分布

Load Distribution of Rolling Bearing With Localized Defect

建立了外滚道含矩形剥落的滚动轴承接触力学模型,基于Hertz接触理论研究了静态径向载荷作用下轴承内部载荷分布,并探究了缺陷形貌(环向跨度角、轴向跨度角)对轴承内部载荷分布的影响。结果表明,当滚动体经过缺陷区域时,其载荷部分卸载或完全卸载,而承载区内的其他滚动体加载;缺陷形貌对滚动轴承内部载荷分布有显著影响。总体来说,缺陷相貌尺寸越大,对内部载荷分布的影响越显著,缺陷环向跨度角和轴向跨度角综合决定了滚动轴承内部载荷分布。

This paper presents a contact dynamic model of deep groove ball bearing with a localized rectangular defect. The internal load distribution of the defective ball bearing is studied based on the model and Hertz contact theory. The effects of defect size （length and width） on load distribution are investigated. The results show that, when a ball enters the defect, it is partly or completely unloaded while other balls in the loaded zone are loaded. The load distribution of defective ball bearing is determined by the defect size to a great extent.